Gene expression during Arabidopsis ovule development at stages 9-12
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA682984 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:To obtain the global gene expression trends during ovule development, we collected samples of the gynoecium in developmental stages 9–10, 11, and 12 with three biological replicates to perform microarray assay.
2020-12-08 | GSE162759 | GEO
Project description:This dataset contains proteomic data from co-immunoprecipitation and mass spectrometry (IP-MS) experiments performed to identify in planta interaction partners of the transcriptional regulator SPOROCYTELESS/NOZZLE (SPL) during Arabidopsis thaliana ovule development. SPL is an essential regulator of megaspore mother cell (MMC) specification, yet the protein complexes through which it acts remained largely unknown. To elucidate the SPL interactome, a pSPL:SPL-GFP fusion was expressed in the pAP1:AP1-GR ap1 cal floral inducible system, allowing synchronized flower development and enrichment of ovule stages preceding MMC formation. SPL-GFP protein complexes were isolated from inflorescences at early ovule developmental stages and analysed by LC-MS/MS. The IP-MS analysis revealed 660 proteins significantly enriched in SPL-GFP immunoprecipitates compared with input controls, providing the first comprehensive view of SPL-associated nuclear partners in reproductive tissues. Among transcription factors co-purifying with SPL, MADS-domain proteins were particularly prominent, representing about one fifth of all enriched TFs. These included SEEDSTICK (STK), SHATTERPROOF2 (SHP2), SEPALLATA1-3 (SEP1–3), and AGAMOUS (AG)—core components of the ovule identity regulatory network. The detection of these ovule-specific MADS-domain transcription factors among SPL interactors strongly supports a model in which SPL is recruited into multimeric MADS-domain complexes that coordinate nucellus development and MMC specification. The SPL IP-MS dataset therefore provides crucial insight into the protein interaction landscape controlling female germline initiation in Arabidopsis. It identifies SPL as a central component of ovule identity complexes and reveals a biochemical connection between SPL activity and the MADS-mediated transcriptional network that defines nucellar fate and auxin-dependent MMC differentiation.
2025-11-18 | PXD070409 | Pride
Project description:Cotton ovule development, mutant vs wild type, Comparisons of DP16 0 dpa ovule Keywords: WildType vs Mutant
2005-11-03 | GSE3546 | GEO
Project description:Cotton fibers are seed trichomes, and their development undergoes a series of rapid and dynamic changes from fiber cell initiation, elongation to primary and secondary wall biosynthesis and fiber maturation. Previous studies showed that cotton homologues encoding putative MYB transcription factors and phytohormone responsive factors were induced during early stages of ovule and fiber development. Many of these factors are targets of microRNAs (miRNAs). miRNAs are ~21 nucleotide (nt) RNA molecules derived from non-coding endogenous genes and mediate target regulation by mRNA degradation or translational repression. Here we show that among ~4-million reads of small RNAs derived from the fiber and non-fiber tissues, the 24-nt small RNAs were most abundant and were highly enriched in ovules and fiber-bearing ovules relative to leaves. A total of 28 putative miRNAs families, including 25 conserved and 3 novel miRNAs were identified in at least one of the cotton tissues examined. Thirty-two pre-miRNA hairpins representing 19 unique families were detected in Cotton Gene Indices version 9 (CGI9) using mirCheck. Sequencing, miRNA microarray, and small RNA blot analyses showed that many of these miRNAs differentially accumulated during ovule and fiber development. The cotton miRNAs examined triggered target cleavage in the same predicted sites of the cotton targets in ovules and fibers as that of the orthologous target genes in Arabidopsis. Targets of the potential new cotton miRNAs matched the previously characterized ESTs derived from cotton ovules and fibers. The miRNA targets including those encoding auxin response factors were differentially expressed during fiber development. We suggest that both conserved and new miRNAs play an important role in the rapid and dynamic process of fiber and ovule development in cotton.
2009-11-12 | GSE16332 | GEO
Project description:Cotton ovule development, mutant vs wild type, Comparisons of DP16 0 dpa ovule Keywords: WildType vs Mutant 7 comparisons and one 0 dpa control. The 1A/DP16 & 4A/DP16 comparisons have 8 slides each, 4 Biological replicates, each biological replicate having 2 technical replicates. Dyes were swapped between technical replicates. The SL1-7-1/DP16 comparison has 6 slides, 3 Biological replicates, each biological replicate having 2 technical replicates. Dyes were swapped between technical replicates. The 5B/DP16, fl/Xu-142, OI/II+N & 53/DP16 comparisons have 4 slides each, 2 Biological replicates, each biological replicate having 2 technical replicates. Dyes were swapped between technical replicates. The 0 dpa control experiment has 3 slides , 3 Biological replicates, no technical replicates and no dye swapping.
2005-11-03 | E-GEOD-3546 | biostudies-arrayexpress
Project description:DNA methylation is essential for plant and animal development. In plants, methylation occurs at CG, CHG, and CHH (H = A, C or T) sites via distinct pathways. Cotton is an allotetraploid consisting of two progenitor genomes. Each cotton fiber is a rapidly-elongating cell derived from the ovule epidermis, but the molecular basis for this developmental transition is unknown. Here we analyzed methylome, transcriptome, and small RNAome and revealed distinct changes in CHH methylation during ovule and fiber development. In ovules, CHH hypermethylation in promoters correlated positively with siRNAs, inducing RNA-dependent DNA methylation (RdDM), and up-regulation of ovule-preferred genes. In fibers, the ovule-derived cells generated additional heterochromatic CHH hypermethylation independent of RdDM, which repressed transposable elements (TEs) and nearby genes including fiber-related genes. Furthermore, CHG and CHH methylation in genic regions contributed to homoeolog expression bias in ovules and fibers. Inhibiting DNA methylation using 5-aza-2'-deoxycytidine in cultured ovules has reduced fiber cell number and length, suggesting a potential role for DNA methylation in fiber development. Thus, RdDM-dependent methylation in promoters and RdDM-independent methylation in TEs and nearby genes could act as a double-lock feedback mechanism to mediate gene and TE expression, potentiating the transition from epidermal to fiber cells during ovule and seed development.
2016-01-21 | GSE61774 | GEO
Project description:DNA methylation is essential for plant and animal development. In plants, methylation occurs at CG, CHG, and CHH (H = A, C or T) sites. CHH methylation is established by the small RNA-directed DNA methylation (RdDM) pathway. Cotton is an allotetraploid consisting of two progenitor genomes, and each cotton fiber is a rapidly-elongating cell from the ovule epidermis. Here we show that inhibiting DNA methylation impairs fiber development. Genome-wide bisulfite -, mRNA-, and small RNA-sequencing analyses reveal that CHH hypermethyaltion through RdDM in euchromatin is associated with expression changes of nearby genes in ovules. The ovule-derived fiber cells not only maintain euchromatic CHH hypermethylation, but also generate additional heterochromatic CHH hypermethylation independent of RdDM. Moreover, CHG and CHH methylation in promoter and transcribed regions contribute to the expression bias of homoeologous genes in the allotetraploid cotton. This epigenetic and expression dynamics of developmental regulation could provide a molecular basis for natural selection and domestication of plants and animals.
2016-01-21 | GSE61760 | GEO
Project description:DNA methylation is essential for plant and animal development. In plants, methylation occurs at CG, CHG, and CHH (H = A, C or T) sites. CHH methylation is established by the small RNA-directed DNA methylation (RdDM) pathway. Cotton is an allotetraploid consisting of two progenitor genomes, and each cotton fiber is a rapidly-elongating cell from the ovule epidermis. Here we show that inhibiting DNA methylation impairs fiber development. Genome-wide bisulfite -, mRNA-, and small RNA-sequencing analyses reveal that CHH hypermethyaltion through RdDM in euchromatin is associated with expression changes of nearby genes in ovules. The ovule-derived fiber cells not only maintain euchromatic CHH hypermethylation, but also generate additional heterochromatic CHH hypermethylation independent of RdDM. Moreover, CHG and CHH methylation in promoter and transcribed regions contribute to the expression bias of homoeologous genes in the allotetraploid cotton. This epigenetic and expression dynamics of developmental regulation could provide a molecular basis for natural selection and domestication of plants and animals.
2016-01-21 | GSE61773 | GEO
Project description:DNA methylation is essential for plant and animal development. In plants, methylation occurs at CG, CHG, and CHH (H = A, C or T) sites. CHH methylation is established by the small RNA-directed DNA methylation (RdDM) pathway. Cotton is an allotetraploid consisting of two progenitor genomes, and each cotton fiber is a rapidly-elongating cell from the ovule epidermis. Here we show that inhibiting DNA methylation impairs fiber development. Genome-wide bisulfite -, mRNA-, and small RNA-sequencing analyses reveal that CHH hypermethyaltion through RdDM in euchromatin is associated with expression changes of nearby genes in ovules. The ovule-derived fiber cells not only maintain euchromatic CHH hypermethylation, but also generate additional heterochromatic CHH hypermethylation independent of RdDM. Moreover, CHG and CHH methylation in promoter and transcribed regions contribute to the expression bias of homoeologous genes in the allotetraploid cotton. This epigenetic and expression dynamics of developmental regulation could provide a molecular basis for natural selection and domestication of plants and animals.
2016-01-21 | GSE61761 | GEO
Project description:Here we identify and characterize a spontaneous mutant allele that disrupts the initiation and specification of the ovule integument in Mimulus nudatus. The mutant phenotype is characterized by the early arrest of the ovule integument or alternatively, the delayed development of a carpel-like structure in place of the integument. Additionally, medusa mutant ovule primordia fail to develop female gametophytic structures. Morphological analyses indicate that a nucellar domain is specified within the ovule and a megaspore-like cell is often specified, but that cell aborts before generating the female gametophyte. We mapped the position of the mutation to a location on Chromosome1. Mapping revealed a primary candidate gene that was a member of a family of MADS-domain containing transcription factors with sequence similarity to the Arabidopsis BEL1 gene (At5G41410) and is an orthologue of the Mimulus guttatus gene MgTOL.A0789.1. Analysis of the sequence of the Mimulus nudatus homolog (referred hereafter as MnBEL1) locus, revealed the insertion of a mitochondrial DNA genomic fragment within the MnBEL1 locus that segregated with the medusa mutant phenotype. The mitochondrial insertion sequence is predicted to disrupt the coding sequence of MnBEL1. RNA expression analysis revealed dramatically reduced levels of the expression of the MnBEL1 in gynoecia from medusa mutant plants relative to wild type sisters. RNA seq analysis revealed that the medusa mutant seedpods failed to express MnBEL1 at wildtype levels. RNA sequence data comparisons between wildtype and medusa mutant seedpods also identified a set of genes, that are expressed in wildtype seedpods, but that are expressed at very low levels or that are not detected in the medusa seed pods. Homologues of many of these genes have been previously shown to be strongly expressed in female gametophyte in Arabidopsis. This RNA seq analysis further indicates a strong developmental disruption and identifies sets of genes with expected roles in female gametophyte development in Mimulus species for further investigation. Our evidence strongly suggests that MnBEL1 is a true functional orthologue of AtBEL1. To the best of our knowledge, these studies provide the first mutational analysis of a BEL1 orthologue outside of Arabidopsis and indicate the functional conservation of this gene between Mimulus and Arabidopsis. This work also presents the first identification of a mutational event in Mimulus that is linked to an insertion of a mitochondrial sequence in the nuclear genome.
2025-06-01 | GSE297725 | GEO